Fundraising Fox

Evertune

New York City, US · Founded 2024 · Delaware corporation · 4 known investors

evertune.ai

Evertune builds AI-powered solutions for marketing and advertising, leveraging machine learning and identity graph technology. The company serves advertising and marketing professionals who need advanced AI capabilities to power modern marketing strategies.

Also known as Evertune AI · Evertune Inc.

AdTechAI & Machine LearningMarketing Tech

Founders & leadership

Evertune was founded in 2024 by Brian Stempeck, Ed Chater, and Poul Costinsky.

BSBrian Stempeck
Brian StempeckinCEO & Co-Founder
ECEd Chater
Ed ChaterinChief Product Officer & Co-Founder
PCPoul Costinsky
Poul CostinskyinChief Science Officer & Co-Founder
MCMatt Cochran
Matt CochraninCTO

Board

NMNihal Mehta
Nihal Mehtain𝕏Board directorCo-Founder and General Partner at Eniac Ventures

Investors · 4

Also in the syndicate · 1

Roger Ehrenberg

Funding

SEC filings, press & company announcements

$19M disclosed across 2 of 3 rounds · 2024–2026

$15MraisedAug 2025 · 13 investors · Other Technology
Rule 506(b)
Officers, directors & promoters on the filing
  • Edward ChaterExecutive Officer, Director
  • Peter DengDirector
  • Brian StempeckExecutive Officer, Director
  • Poul CostinskyDirector
Offering amount
$15M
Amount sold
$15M
First sale
Jun 2025
Incorporated
Corporation, Delaware, 2024
Federal exemptions
06b
Full filing on SEC EDGAR ↗
$4MraisedOct 2024 · 16 investors · Other Technology
Rule 506(b)
Officers, directors & promoters on the filing
  • Poul CostinskyExecutive Officer, Director
  • Brian StempeckExecutive Officer, Director
  • Nihal MehtaDirector
  • Edward ChaterExecutive Officer, Director
Offering amount
$4M
Amount sold
$4M
First sale
Sep 2024
Incorporated
Corporation, Delaware, 2024
Federal exemptions
06b
Full filing on SEC EDGAR ↗

Source: SEC EDGAR Form D. Amounts as filed; amended filings shown once at their latest values.

Company profile

researched Aug 2026

Evertune is a marketing platform focused on brand discovery in AI search, a discipline it and the industry call Generative Engine Optimization (GEO). The platform queries large language models at scale — sampling each prompt up to 100 times per model across 11 monitored systems including ChatGPT, ChatGPT Search, Gemini, Gemini Search, Google AI Mode, Google AI Overviews, Meta AI, Claude, Copilot, Perplexity and DeepSeek — to produce statistically significant measures of how often and how favorably a brand appears in generated answers, benchmarked against competitors in its category.

The product is organized into four stages: Explore (a Prompt Agent that mines EverPanel, a proprietary consumer panel of more than 150 million real user prompts, and clusters prompts into topics), Measure (AI Brand Index, word association and sentiment analysis, consumer preferences, content and citation analytics, shopping intelligence, site audits for AI crawler access, and bot analytics), Act (an Insights & Action Agent and Content Agent that generate recommendations, messaging and blog drafts, plus Partner Connect for affiliate placement on sources AI models cite), and Advertise (an Ads Agent that builds and manages ChatGPT ad campaigns from visibility data and retargets users after they leave the AI conversation).

Evertune distinguishes between base-model data, obtained through direct API access and reflecting what a model learned in training, and consumer-app data reflecting responses after live web retrieval; the delta between the two is presented as an indicator of how effectively a brand's SEO influences model outputs. The company reports offices in New York City, Seattle and Denver.

Founding story

According to the company and press coverage, Evertune was launched in April 2024 by three colleagues from The Trade Desk: Brian Stempeck (CEO), an early commercial executive there; Ed Chater (Chief Product Officer); and Poul Costinsky (Chief Science Officer). Chater and Costinsky joined The Trade Desk through its acquisition of the cross-device identity graph company AdBrain, where they had worked together on machine learning for identity graphs. The founding idea came from the group's own research querying LLMs such as Perplexity, Llama, ChatGPT and Gemini, where they found wide variation in responses to the same queries and difficulty explaining why models recommended particular products; one account cites Stempeck's personal use of ChatGPT for car research as an early prompt for the concept.

Business model

Evertune sells software to brands, advertisers and agencies. Coverage of its commercial launch describes an AI Brand Index and out-of-the-box query reports included for customers, with additional custom surveys and analytics charged on a usage basis. The site lists a public Pricing page and a demo-request sales motion. Later product expansion adds paid-media capability, where Evertune builds and manages ChatGPT ad campaigns on behalf of clients.

Subscription/SaaS platform access combined with usage-based charges for custom reports and analytics, per reporting on its commercial launch; the platform also encompasses managed advertising campaigns on AI surfaces.

Traction

Company materials cite more than 700 advertisers and agencies using the platform and named clients including Halo Collar, Canada Goose, HexClad, Roku, WPP, Miro and Choreograph. A third-party profile describes the company as a roughly 30-person Series A startup analyzing over one million AI responses per customer per month. A published customer example describes Halo Collar moving from fifth to first among recommended GPS dog fence collar brands in ChatGPT's foundational model within two months. Note that a third-party listing also shows an employee range of 1,001–5,000, which conflicts with the 30-person figure in the same source.

Latest developments

The company has extended beyond visibility measurement into activation and paid media, launching a ChatGPT Ad Agent that builds ChatGPT campaigns from GEO data and retargets users after they exit the AI conversation, alongside Partner Connect for affiliate placement on cited sources. Recent published content covers how ChatGPT ads are bought, targeted and measured, and the case for repeated prompt sampling.

Full profile — market position, technology, go-to-market, geography, history, risks & controversies

Market position

Evertune positions itself as a purpose-built GEO platform rather than a retrofitted SEO tool, and claims to be the only GEO platform covering the full AI customer journey from measurement to paid placement, and the first to build AI advertising capability on GEO data. It reports use by more than 700 advertisers and agencies and says it has been featured in the New York Times, Wall Street Journal, The Economist, The Information, Axios, Forbes, Reuters, AdWeek and AdAge. These claims come from the company's own materials and are not independently verified in the sources provided.

The company's stated differentiators are statistical rigor and data provenance: repeated sampling of each prompt up to 100 times per model (which it says reduces margin of error to roughly one point overall and two points at topic level, versus competitors sampling once daily); direct API access to base models to isolate training-derived brand perception from live-retrieval responses; and EverPanel, a demographically weighted panel of over 150 million real user prompts used to ground prompt selection in observed user language rather than keyword lists. It also cites end-to-end coverage spanning analytics, content generation, affiliate partner connections and ChatGPT advertising with retargeting.

Technology

The platform uses direct API integrations with model providers (OpenAI, Google, Anthropic, Meta, Perplexity, DeepSeek and others) to sample base-model outputs, plus consumer-app data collection for live-search responses. It applies semantic clustering of prompts into topics, statistical sampling methodology, source and citation scoring (Topic Relevance and Brand Relevance, sorted into Owned, Strength and Opportunity URLs), site audits scoring bot permissions, sitemaps, load performance, JSON-LD, titles, meta descriptions and heading hierarchy across up to 1,000 pages, and bot analytics tracking AI crawler visits. Agentic workflows (Prompt Agent, Insights & Action Agent, Content Agent, Ads Agent) generate recommendations, content drafts in six templates at 250–3,000 words, and ad campaigns.

Go-to-market

Direct enterprise sales with demo requests, supported by content marketing (blog, research, webinars, a model release tracker, GEO educational material and a bi-weekly newsletter) and agency relationships. Trade press coverage at launch and funding announcements have been used to build awareness in the ad tech community.

Mid-market and enterprise brands, advertisers and agencies. The company cites clients across finance, retail and e-commerce, automotive, pharma, technology, travel, food and beverage, entertainment, CPG and B2B, and reports especially strong adoption in software, DTC, automotive and healthcare. Named customers include Halo Collar, Canada Goose, HexClad, Roku, WPP, Miro and Choreograph (WPP's data and technology unit).

Geography

Headquartered in New York City (35 East 21st Street, 7E), with additional offices in Seattle (4311 11th Ave NE) and Denver (2128 W 32nd Ave).

History

Founded in 2024 by former The Trade Desk employees, Evertune emerged with a seed round reported at $4M (October 2024) from Eniac Ventures, NextView Ventures and Roger Ehrenberg, alongside a roster of ad tech angels including former Trade Desk executives Rob Perdue, Susan Vobejda and Vivian Yang, plus Jonah Goodhart, Jay Friedman and Tal Chalozin. It announced full commercial launch in November 2024 with its AI Brand Index product. In August 2025 it raised a $15M Series A led by Felicis Ventures with returning seed investors participating. The company subsequently expanded from measurement into content activation, affiliate partnerships and advertising, launching a ChatGPT Ad Agent. Company materials state total funding of $20M; a third-party database lists $19.8M across three rounds.

Risks & controversies

The sources contain no reported controversies. Notable data caveats: funding totals differ between the company's stated $20M and a third-party listing of $19.8M across three rounds, and that listing includes a 2010 $800K seed round and an employee band of 1,001–5,000 that are inconsistent with the company's 2024 founding and other reported headcount. Much of the traction, differentiation and press-coverage information originates from Evertune's own website. Business risk factors implicit in the sources include dependence on third-party model provider APIs and on the continued growth of AI search as a discovery channel, and coverage notes that mechanisms for brands to directly influence LLM outputs remain immature.

Compiled by commissioned research from 8 cited public sources — announcements, filings, and press listed under research sources below.

Key figures

latest reported
AI models monitoredJan 202611 models
AI prompts per reportAug 2025100,000 prompts
AI responses analyzed per customerJan 20251,000,000 responses per month
EverPanel prompt panel sizeJan 2026150,000,000 user prompts
HeadcountJan 202530 employees
Office locationsJan 20263 offices
Prompt sampling rateJan 2026100 samples per prompt per model
Total disclosed fundingJan 2026$20M
Total funding third partyAug 2025$19.8M

Company-reported or press-reported figures, each dated to when it was claimed — not independently audited.

Competitors · 10

by search overlap
OpenAI31 shared keywordsOpenAI is an AI research and deployment company focused on developing artificial general intelligence (AGI) with emphasis on safety and beneficial outcomes for humanity.
SEMrush24 shared keywordsSemrush provides competitive intelligence, SEO, keyword research, and content generation tools for growth marketers and small teams to improve visibility and optimize their acquisition funnel across Google and AI search.
Zapier23 shared keywordsZapier provides a platform for connecting AI models and agents to workflows and business applications, enabling teams to automate tasks across over 9,000 apps without coding. The platform serves enterprises, operations teams, and businesses of all sizes looking to deploy AI-driven automation for lead capture, customer support, employee onboarding, and other business processes.
Ahrefs19 shared keywordsAhrefs is an SEO and marketing platform that provides tools and data for keyword research, competitor analysis, content creation, site auditing, rank tracking, and monitoring brand visibility across search engines and AI chatbots. It serves marketers and enterprises, offering an API, custom dashboards, and AI-driven insights for improving search rankings and traffic.
Writesonic18 shared keywordsWritesonic is a platform for growth teams to monitor brand visibility across AI search engines (ChatGPT, Perplexity, Claude, Gemini) and take automated action through content creation, citation outreach, and technical fixes to improve AI search visibility and pipeline impact.
Searchenginejournal17 shared keywordsSearch Engine Journal is an online media publication that produces news, guides, and analysis about search engine optimization, AI search, and digital marketing for SEO professionals and marketers.
Netezza15 shared keywordsIBM is a global technology company whose business spans enterprise software (including Red Hat, HashiCorp, and Confluent), IT infrastructure such as mainframes, servers, and storage, and IT consulting services. The company is also investing heavily in quantum computing and AI-based enterprise offerings, including its Lightwell open-source software security clearinghouse and the Anderon quantum wafer foundry.
Blog14 shared keywordsThis is Google's official company blog, publishing announcements about its products and initiatives including Gemini AI models, Google Cloud infrastructure, Android, and Google DeepMind robotics research. It serves as a communications channel covering the company's technology across AI, cloud computing, and consumer products.
Displair13 shared keywordsMashable is a digital media and news publication covering technology, science, entertainment, digital culture, and consumer product reviews. It publishes articles, gift guides, deals, and online games alongside coverage of internet creators and social trends.
Profound13 shared keywordsProfound provides tools for PR and brand teams to monitor and influence how their brands appear in AI answer engines like ChatGPT, tracking brand sentiment and citations across domains. It surfaces earned media opportunities and supports generative engine optimization to improve brand visibility in AI-generated responses.

Companies competing with Evertune for the same Google search keywords, organic and paid, via search-intersection analysis.

Timeline · 3

launches, deals, and filings
Jan 2026
Launch of ChatGPT Ad Agent

Evertune announced a ChatGPT Ad Agent that builds and manages ChatGPT ad campaigns from a brand's AI visibility (GEO) data, with retargeting of users after they leave the AI conversation.

source ↗

Aug 2025
Evertune raises $15M Series A led by Felicis Ventures

Series A with returning investors Eniac Ventures, NextView Ventures and Roger Ehrenberg, plus angels described as leaders from OpenAI, Google, Meta and Uber; funds earmarked for an enterprise-grade AI marketing suite, AI-native ad formats and AI-commerce tooling.

$15M source ↗

Nov 2024
Full commercial launch and debut of AI Brand Index

Evertune announced its full commercial launch, offering advertisers and agencies an 'AI Brand Index' market-research report showing which brands LLMs recommend for given queries, plus custom usage-priced reports.

source ↗

Dated company events from announcements, filings, and press; legal rows summarize public dockets and regulator releases.

Legal entities · 1

corporate structure
EvertuneDelaware

In the news

Research sources · 8

primary sources listed

8 public sources were cited for this profile; the first-party ones are listed here.

Frequently asked questions

What does Evertune do?
Evertune is a generative engine optimization platform that measures and improves how AI models recommend brands.
Who founded Evertune?
Evertune was founded by Brian Stempeck, Ed Chater, Poul Costinsky in 2024.
Who are Evertune's investors?
Evertune's investors include Eniac Ventures, Felicis Ventures, NextView Ventures.
How much funding has Evertune raised?
Evertune has disclosed $19M raised across 2 of its 3 known rounds.
Where is Evertune headquartered?
Evertune is headquartered in New York City, US.